alpha-aroyl-beta-trichlormethyl-ethylenes



Patented Nov. 17, 1953 UNITED STATES ATENT OFFICE No Drawing. Application April 2, 1951, Serial No. 218,890-

Glaiins'priority', application Switzerland April 20, 1950 1. Claim (-01. 260-592) The present invention is concerned with valuable a-aroyl c-trichloromethyl-ethylenes.

While a large number of compounds with bactericidal and fungicidal action are known, none can be said to be ideal, for each to some extent is tissue irritating. The embodiment of new compounds with enhanced bactericidal and fungicidal activity and with reduced or, at least, without increased irritation. to tissue therefore represents adesideratum in the art.

A rimary object of the" present invention is the embodiment of new compounds of the character described. This is achieved by the -aroyl- Brtricliloromethyl ethylenes of. the present. invention These ethylene compounds correspond to the: formulawherein Rstands for" an aryl' radical containing at least one halogen atom; addition' to' the halogen atom cr" atoms; the aryl nucleus may alsd carry a: lower 'alkyl group;- such a e-methyl, ethyl, propyl'; butylo'r the like.

These new compoundsare characterized by their b'acteriostati'c andfungistatic activity; they are therefore useful as disinfecting agentsand' also therapeutically in the treatment of illnesses due to fungi. Particularly valuable in this regard are the a-(p-fluoro-benzoyl) -p-trichloromethyl ethylen'e, v a- (2-methyl 4 fluoro-benzoyl) 5-trichloromethyl-ethylene,

illiistrative embodiments" thereof. Parts by weight bear-the same relationship to parts-by volume as does the gram to the--cubiccentimeten Percentages: are i by" weight. The temperatures are given in degrees centigrade'? a- (3,4-dich'loroben-- zoyl) ,B trichloromethyl ethylene, a (2,5

Example 1 31 parts by weight of p-chloro-acetophenone and 30 parts by weight of anhydrous chloral are heated to boiling for 20 hours in 15 parts by volume of glacial acetic' acid. After evaporat 1 ing Off the Volatile ccmp V I reaction mixture vacuo benzoyl) B hydroxy. fi trichloromethyl ethane crystallizes out; It melts a't LIB-119.-

10 parts" by weight of the thus-obtained a-(p-- chlor'o benzoyl) p hydidxj 9 trichloromethyl ethane are assayed in I06 parts by volume of concentrated'sulfuric acid. After standng for two ours' at 20 the reaction so'iiit rl s poured onto ice water. The separated: solid product is isolated, washed with water, a d recrystallized from" ethyl'alcoliol" of 72 str The thus-obtained a-(p-chloro-benzoyl)-Btri chloromethyl ethyleiie of the" formulais pale yellowand melts" at -116;

Eflldlfibl? A mixture of 9.5 parts by weight of 3,4-dichloroacetophenone', 7.5 parts by weight of anhydrous chloral and 8 parts by volume of glacial acetic acid is heated to boiling for 40' hours: Thereupon, after evaporatingthe-reaction mix:- ture to dryness in vacuoon the water-bath, the residue is crystallizedfi'om a small quantity of carbontetrachloride, thprdductthus obtained being u,-(3,4-diCh10fOqjBllZ0y1) fi hydloliy fi 'ell chloromethyl-ethane' pure'form; melting at 1'16-117.

30 parts by weight of "thefthus -obtained(4334 d1chloro benzoyl) p hydroxyc trich'l oro" methyl-ethane are dissolved m parts by" vol-- ume of a mixture of equal parts of concentrated" sulfuric acid and oljeu'm" (24%) arid then ai lowed to stand for 6 hou rs at'20". The reaction mixture is then poured onto ice, whereupon" a (3,4 dichlorobehzoyl') -B 'trich1oroirithyi ethylene of the formula ll-Q 0 amn on-o 013 01 separates out as an oil 'whiclfsoon crystalli It is purified by recrystalliaation"fifomethyl alc'o 1101 and then melts at 66 67 Theyield is" 212 parts by weight.

Eiampze e' A mixture of 19 parts by weight of 2,5-dichloroacetophenone, 15 parts by weight of anhydrous chloral and 16 parts by volume of glacial acetic acid is heated to boiling for 40 hours. After evaporatingoff the volatile components of the resulting reaction mixture in vacuo at 100", a. (2,5 dichloro benzoyl) 3 hydroxy trichloromethylethane is obtained. After recrystallization from hexane, it melts at 101-102.

16 parts by weight of the thus-obtained a- (2,5 dichloro benzoyl) ,8 hydroxy trichloromethyl-ethane are allowed to stand for 3 days at in 80 parts by volume of concentrated sulfuric acid. The reaction mixture is then poured onto ice, the separated oil extracted with ether, the ether removed from the ethereal solution, and the obtained residue subjected to distillation in high vacuo. The resultant 0.- (2,5 dichloro benzoyl) B trichloromethyl ethylene of the formula distils at 145-150" under 1 mm. pressure. It solidifies in crystalline form and, after recrystallization from petroleum ether, melts at 57-58".

Example 4 A mixture of 59 parts by weight of p-fiuoroacetophenone, 64 parts by weight of anhydrous chloral and 30 parts by volume of glacial acetic acid is heated to boiling for 40 hours. After evaporating off the volatile components of the resulting reaction mixture in vacuo at 100, a- (p fluoro benzoyl) ,6 hydroxy 13 trichloromethyl-ethane, melting at 94-95, is obtained.

30 parts of this a-(p-fiuoro-benzoyl)- 3-hydroxy-B-trichloromethyl-ethane are dissolved in 150 parts by volume of concentrated sulfuric acid and allowed to stand for 14-. hours at 20. The reaction solution is then poured into ice water, whereupon the a-(p-fluoro-benzoyl) -Btrich1oromethyl-ethylene of the formula separates out. After recrystallization from hexane, this compound melts at 117-118".

Example A mixture of 38 parts by Weight of Z-methyll-fiuoro-acetophenone, prepared from m-fluorotoluol and acetic anhydride in the presence of aluminum chloride, 38 parts by weight of anhydrous chloral and parts by volume of glacial acetic acid is heated to boiling for 40 hours. Thereupon, after evaporating the reaction mixture to dryness in vacuo on the water-bath, the residue is crystallized from a small quantity of carbon tetrachloride. In this way, there is obtained at (2 methyl 4 fiuoro benzoyl) 13 hydroxy-,8-trichloromethylethane, melting at 103-105".

30 parts by weight of the thus-obtained a-(2- methyl 4 fiuoro benzoyl) e hydroxy p trichloromethyl-ethane are admixed with 21 parts by weight of phosphorus pentoxide, and the mixture heated to 110 for 1 hour. After cooling, the reaction mixture is taken up in 100 parts by volume of ethyl alcohol and the resultant solution poured into water. The precipitated oily product is taken up in ether and, after evaporating off the solvent, is then sub- '41 jected to distillation. The cl-(2-methyl-l-fluorobenzoyl) B trichloromethyl ethylene of the formula distils over at -122" under 0.05 mm. pressure as a weakly yellowish oil.

Example 6 25 parts by weight of the chloral addition product of 4-chloro-l-acetyl-naphthalene (melting point 92-93 upon recrystallization from hexane; obtained analogously to the other examples) are triturated with 25 parts by weight of phosphorus pentoxide and heated on the water-bath for two hours. After cooling, the mixture is dissolved in 150 parts by volume of hot ethyl alcohol, and water is gradually added until the reaction product begins to separate out. Upon cooling, the a- [4-chloro-naphthoyl-(1)l-B-trichloromethyl-ethylene of the formula crystallizes out in pure form. It melts at 75-76".

Example 7 40 parts by weight of para-bromacetophenone are heated to boiling for 20 hours with 30 parts by weight of anhydrous chloral and 20 parts by volume of glacial acetic acid. After the evaporation of the volatile parts in vacuo there remains the a (para bromobenzoyl) 5 hydroxy 5- trichloromethyl ethane in the form of a crystalline mass. When recrystallized from carbon tetrachloride, it melts at 20 parts by weight of this compound are taken up in 100 parts by volume of concentrated sulfuric acid. After about 20 minutes dissolution is complete. The reaction solution is allowed to stand for 2 hours at 20 and then poured into ice water. The a (para bromobenzoyl) fi trichloro methyl ethylene thus obtained has the formula and, when recrystallized from ethyl alcohol, melts at 119-120".

Example 8 21 parts by weight of para-iodoacetophenone are heated to boiling for 20 hours with 13 parts by weight of anhydrous chloral and 15 parts by volume of glacial acetic acid. After the evaporation of the volatile parts in vacuo there remains the a (para-iodobenzoyl) B hydroxy ,8 trichloro methyl ethane in the form of a crystalline mass. When recrystallized from carbon tetrachloride, it melts at 20 parts by weight of this compound are taken up in 100 parts by volume of concentrated sulfuric acid. After about 20 minutes dissolution is complete. The reaction solution is allowed to stand for 2 hours at 20 and then poured into ice water. The a. (para iodobenzoyl) B trichloromethylethylene thus obtained has the formula and, when recrystallized from ethyl alcohol, melts OTHER REFERENCES at Ill-112. a

Having disclosed the invention, what is claimed st Beruchte, vol. 25, pp. 792-802 (1892) Mayer et al.: Berichte, vol. 60, pp. 22782283 The compound a (3,4 dichloro benzoyl) ,6- 5 trichloro methyl ethylene having bacteriostatic Bellstems Hanbuch der orgamschen q and fungistatic activity vol. 7, second supplement, page 299, published 1948 by Alien Property Custodian.

JEAN DRUEY.

References Cited in the file of this patent 10 UNITED STATES PATENTS Number Name Date 2,532,558 Kirby Dec. 5, 1950 

